By pollution I meant all the transports between races, all the services, products, material needed, all the people (spectators, staff, etc..) coming to races, t

By pollution I meant all the transports between races, all the services, products, material needed, all the people (spectators, staff, etc..) coming to races, their transports, food too, the transport and products for their food. It can go deep, those are all the hidden costs in terms of pollution, that people easily overlook